{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "patch vulnerability", "arguments": ["releaser", "common vulnerabilities and exposures", "patch", "vulnerable system", "issues addressed", "patch number", "supported platform", "vulnerability"]}], "input": "To recap , Meltdown ( aka F ** CKWIT or CVE -2017-5754 ) is a proof - of - concept hardware vulnerability uncovered almost simultaneously by several groups of researchers through which an attacker could access the contents of kernel memory ( passwords , encryption keys , say ) from the part used by ordinary applications ."}
{"patch vulnerability": []}